    public boolean logout(String account, String token) {
        boolean login = isLogin(token);
        if (!login) {
            throw new IllegalstateException("当前用户被禁用或已下线！");
            try {
            } catch (Exception e) {
                log.error("用户登出失败！用户账号：{}",
                        account, e);
                throw new IllegalstateException("用户退出失败！用户账号：" + account);
            }
            return true;
        }
    }